| Yakima County Washington Cities/Towns - Ahtanum, Eschbach, Gleed, Grandview, Granger, Harrah, Mabton, Moxee, Naches, Satus, Selah, Summitview, Sunnyside, Terrace Heights, Tieton, Toppenish, Union Gap, Wapato, West Valley, White Swan, Yakima (County Seat), Zillah |
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Your Ad Here Yakima County is a county located in the U.S. state of Washington. In 2007, its population was 281,631. The county seat is Yakima. History Yakima County was formed out of Ferguson County on January 21, 1865. Ferguson County, no longer in existence, had been formed out of Walla Walla County on January 23, 1863. It is named after the Yakama tribe of Native Americans. |